Moz Q&A is closed.
After more than 13 years, and tens of thousands of questions, Moz Q&A closed on 12th December 2024. Whilst we’re not completely removing the content - many posts will still be possible to view - we have locked both new posts and new replies. More details here.
The main navigation is using JS, will this have a negative impact on SEO?
-
Hi mozzers,
We just redesigned our homepage and discovered that our main nav is using JS and when disabling JS, no main nav links was showing up. Is this still considered bad practice for SEO? https://cl.ly/14ccf2509478
thanks
-
Thanks Jose!
-
Googlebot does not render JavaScript
We hear very often about JavaScript rendering is the assumption that the crawler is responsible for the rendering. But that's not the case. The rendering is done by the indexer (from Google Caffeine).More specifically, the Web Rendering Service (WRS), which is part of Google Caffeine. And this is exactly where the second great difficulty lies in the area of JavaScript SEO.
Gary Illyes says: "Also, to clarify, WRS is a subsystem of Caffeine, just like the PageRanker (cos yes, we still use it) or the canonicalization algorithm."
The process flow between the crawler and the indexer:
HTML files are downloaded.
CSS and JavaScript data will be downloaded in parallel.
WRS (Web Rendering Service) (part of Google Caffeine) is used to run JS.
WRS renders all files.
Now Google Caffeine can index the content if necessary.
And that's when Googlebot can crawl new links.
Why is that a problem? For the crawler to be able to enter the content and follow the links, it must first pass the data to the indexer. The indexer renders the content and returns it to the crawlers. Only now can the crawler see the content and follow the links. On the next page, the game starts again. Page by page. (many processes)Unlike conventional pages, where the crawler crawls numerous pages and, after crawling, passes everything collectively to the indexer. (few processes)
This process presents another challenge to search engines.
Regards
-
The only bad SEO Practice regarding JS that I've of is trying to hide the JS files from Search Engines, apparently, Google needs to render a whole page as it indexing it; so blocking any JS (& CSS for that matter) isn't a good thing.
-
Hi There,
JS rendered UI isn't negative, it is however not a good practice also.
You can find complete information to the concept of JS rendered pages and UI on this link, https://www.portent.com/blog/seo/javascript-bad-for-seo.htm .
I hope this helps.
Regards,
Vijay
Got a burning SEO question?
Subscribe to Moz Pro to gain full access to Q&A, answer questions, and ask your own.
Browse Questions
Explore more categories
-
Moz Tools
Chat with the community about the Moz tools.
-
SEO Tactics
Discuss the SEO process with fellow marketers
-
Community
Discuss industry events, jobs, and news!
-
Digital Marketing
Chat about tactics outside of SEO
-
Research & Trends
Dive into research and trends in the search industry.
-
Support
Connect on product support and feature requests.
Related Questions
-
SEO on dynamic website
Hi. I am hoping you can advise. I have a client in one of my training groups and their site is a golf booking engine where all pages are dynamically created based on parameters used in their website search. They want to know what is the best thing to do for SEO. They have some landing pages that Google can see but there is only a small bit of text at the top and the rest of the page is dynamically created. I have advised that they should create landing pages for each of their locations and clubs and use canonicals to handle what Google indexes.Is this the right advice or should they noindex? Thanks S
Intermediate & Advanced SEO | | bedynamic0 -
Lightboxes and SEO
Do lightboxes (AKA popup boxes when you click "learn more" type CTAs) have any negative effect on SEO? We are looking at revamping our sites to have more of a tiled approach, and a lightbox with summary content popping out with additional CTAs, directing to pages with more information or free trial pages. Is there any downside to this approach from an organic perspective? is there anything specific to keep in mind when creating these if not?
Intermediate & Advanced SEO | | Chris81980 -
SEO site Review
Does anyone have suggestions on places that provide in depth site / analytics reviews for SEO?
Intermediate & Advanced SEO | | Gordian0 -
How does the use of Dynamic meta tags effect SEO?
I'm evaluating a new client site which was built buy another design firm. My question is they are dynamically creating meta tags and I'm concerned that it is hurting their SEO. When I view the page source this is what I see. <meta name="<a class="attribute-value">keywords</a>" id="<a class="attribute-value">keywordsGoHere</a>" content="" /> <meta name="<a class="attribute-value">description</a>" id="<a class="attribute-value">descriptionGoesHere</a>" content="" /> <title id="<a class="attribute-value">titleGoesHere</a>">title> To me it looks like the tags are not being added to the page, however the title is showing when you view it in a browser and if use a spider view tool, it sees the title. I'm guess it is being called from a DB. So I'm a little concerned though that the search engines are not really seeing the title and description. I'm not worried about the keywords tag. Can anyone shed some light on how this might work? Why it might not being showing the text for the description in the page code and if that will hurt SEO? Thanks for the help!
Intermediate & Advanced SEO | | BbeS0 -
Are there any negative effects to using a 301 redirect from a page to another internal page?
For example, from http://www.dog.com/toys to http://www.dog.com/chew-toys. In my situation, the main purpose of the 301 redirect is to replace the page with a new internal page that has a better optimized URL. This will be executed across multiple pages (about 20). None of these pages hold any search rankings but do carry a decent amount of page authority.
Intermediate & Advanced SEO | | Visually0 -
Migrating online store to subdomain using shopify and effects on seo and energy down the road for seo
I'm looking for some clarity... Looking at using Shopify for an existing online store that we have to migrate. Setting up the store with shopify means we will be using a subdomain such as shop.mywebsite.com instead of mywebsite.com/shop. The following are points to consider when responding The client currently has an online store, however it's a proprietary shopping store and CMS that has since gone defunct and they need to migrate to an alternative in order to survive online against new CMS systems that allow the site and its content to be better optimized. There is a lot of existing SEO done on the current site that we don't want to loose PR on. There is roughly 2000 products Client has a fixed budget, dealing with checkout issues, custom work and various other "bugs" seems to be easier controlled with Shopify...thus budget can be used more on content/strategy and migration We want to run the main site in Wordpress and are wanting to use Shopify since it supports a gateway, has great features and seems like it would allow us to get more bang for the buck and can focus more on the main site and content strategy and drive traffic to the subdomain store if needed Or main concern is the effort of migrating 2000+ products to shopify and the traffic and PR it gives the current site will have a negative effect on the main domain itself. Should we really be considering this path? The domain is diveidc.com One main benefit to the subdomain is the ability to clearly segment products from the service portion of the site in the analytics and focus 2 clear strategies and track it in a very defined manner. We're really on the fence with this...any thoughts are welcome.
Intermediate & Advanced SEO | | MAGNUMCreative0 -
Should I Use City Name in URL?
Having a website designed for a car dealership and deciding what attributes to use in the URL. Should I include the city name in the URL? Or does that help for SEO purposes? Other ideas of what to research or try are appreciated too. Thanks 🙂
Intermediate & Advanced SEO | | kylesuss0 -
Will having image lightbox with content on a web page SEO friendly?
This website is done in CMS. Will having lightbox pop up with content be SEO friendly? If you go to the web page and click on the images at the bottom of the page. There are lightbox that will display information. Will these lightbox content information be crawl by Google? Will it be consider as content for the url http://jennlee.com/portfolio/bran.. Thanks, John
Intermediate & Advanced SEO | | VizionSEO990